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20121129
20121207
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's been 34 years since the birth of louise joy brown, the world's first test tube baby. today, more than 60,000 american babies are born each year thanks to in vitro fertilization. now stanford researchers have found a way to help even more infertile couples. >> 48 hours of culture, we can predict the viability of a human embryo. >> reporter: researchers thawed 75 donated single cell embryos and used time lapse photography to track their development. the 75 embryos, only 53 had normal timing, normal cell division. but the big surprise of the 53 that looked normal, half had the wrong number of chromosomes. >> it's quite profound that embryos that appear to be developing normally may harbor such a high percentage or such a high degree of chromosomal abnormalities. >> reporter: dr. barry behr, codirector of the ivf program, says where fragmentation comes n those extra bubbles are fragments that contain chromosomes and that spells trouble. >> should be 23 pairs in total chromosomes. if you have a mismatch or an extra one or a missing one, you create an abnormal embryo. >> reporter: so now wi
Search Results 0 to 0 of about 1